/*
 * Copyright 2002-2007 Network Engine for Objects in Lund AB [neotechnology.com]
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.impl.event;


/** 
 * Re-active event listeners should implement this interface. When a 
 * re-active event is generated the <CODE>reActiveEventReceived</CODE> method
 * will be invoked on all re-active listeners registered on that event. 
 */
public interface ReActiveEventListener
{
	// EE:	The contract should specify whether event and data can ever
	//		be null
	/**
	 * Invoked if <CODE>this</CODE> is registered on event type 
	 * <CODE>event</CODE> and an event of type <CODE>event</CODE> has been 
	 * generated.
	 *
	 * @param event the generated event type
	 * @param data the event data
	 */
	public void reActiveEventReceived( Event event, EventData data );
}